Wheelchair frame



FIG. 1 is a top perspective view of a wheelchair frame showing our new design, the broken lines are for illustrative purposes only and form no part of the claimed design;

FIG. 2 is a right side elevational view thereof; the left side view being a mirror image of that shown;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a rear elevational view thereof; and,

FIG. 6 is a bottom plan view thereof.

The stippling shown on the drawing is for shading purposes only. 

The ornamental design for a wheelchair frame, as shown and described. 